diff --git a/app/coap/coap_io.h b/app/coap/coap_io.h
index 801b7328..090149c4 100644
--- a/app/coap/coap_io.h
+++ b/app/coap/coap_io.h
@@ -5,6 +5,8 @@
 extern "C" {
 #endif
 
+#include "c_types.h"
+#include "lwip/ip_addr.h"
 #include "espconn.h"
 #include "pdu.h"
 #include "hash.h"
diff --git a/app/include/rom.h b/app/include/rom.h
index ca6227fe..ba48fcb7 100644
--- a/app/include/rom.h
+++ b/app/include/rom.h
@@ -3,6 +3,8 @@
 #ifndef _ROM_H_
 #define _ROM_H_
 
+#include "c_types.h"
+
 // SHA1 is assumed to match the netbsd sha1.h headers
 #define SHA1_DIGEST_LENGTH		20
 #define SHA1_DIGEST_STRING_LENGTH	41
diff --git a/app/modules/coap.c b/app/modules/coap.c
index 8e1ba6c0..1d496e5f 100644
--- a/app/modules/coap.c
+++ b/app/modules/coap.c
@@ -12,6 +12,7 @@
 
 #include "c_types.h"
 #include "mem.h"
+#include "lwip/ip_addr.h"
 #include "espconn.h"
 #include "driver/uart.h"
 
diff --git a/app/modules/mqtt.c b/app/modules/mqtt.c
index 0cd2398b..6ba3f8fa 100644
--- a/app/modules/mqtt.c
+++ b/app/modules/mqtt.c
@@ -12,6 +12,7 @@
 
 #include "c_types.h"
 #include "mem.h"
+#include "lwip/ip_addr.h"
 #include "espconn.h"
 
 #include "mqtt_msg.h"
diff --git a/app/modules/net.c b/app/modules/net.c
index 4c91f44a..f0b3256c 100644
--- a/app/modules/net.c
+++ b/app/modules/net.c
@@ -12,6 +12,7 @@
 
 #include "c_types.h"
 #include "mem.h"
+#include "lwip/ip_addr.h"
 #include "espconn.h"
 #include "lwip/dns.h"